I have a single alternator, charging the house bank. It's an Amptech 125. I have an identical,one as a spare, still in its box. It's an easy fix if the alternator fails. I have a Balmar digital duo charge, that in theory looks after the starter bank, but currently isn't functioning properly and work on it is on the spring"to do" list. The PO has hooked up the Blue Sea smart charging relay with remote switches for the helm. I don't use this setup to charge the starter batteries as they are Group 24's and the house bank comprises 10 T105's. So, the start batteries are not combined with the house bank unless the windlass is in operation. The starter batteries have a dedicated charter when on shore or generator power. Still there's a bit of work to do here.
The Genny also has a dedicated start battery, that is separately charged. The bow thruster is 24 volt and also has a dedicated charger and separate AGM bank under the master berth.
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